Steam-ejector apparatus



July 10, 1923.

M. LEBLANC STEAM EJECTOR APPARATUS Filed J-u] .y 31, 1918 N NTOR WITNESSES Patented July 10, 1923.

UNITED" 1ST T-Es- MAURICE LEBLANC, Ior 'vnmson-snmn "-rAR-ofaoIssY, F ANCE, AssIGIvoia To SOGIETE'ANONYME 201m unxrrorrarron DES rnocnnns wnsrmenousn e BLANC, or I rams, FRANCE. v

ISTIEAM-EJEGTOR APPARATUS.

Application filed July '31,

T 0 all whom it may concern:-

Be-it known that I, .MAURICE LEBLANC, citizen of the Republic of France, residing at Va-l-sur-Seinev par Croissy, Seine and Oise, France, have invented new and useful Improvements in-or Relatingto Steam- Ejec-tor Apparatus, of which the following is a specification.

This invention relates to steam ejector apparatus of the kind in which steam ejectors operate in series with intermediate condensers for the production of. a vacuum.

One well known arrangement of this kind comprises two or more ejectors located parallel to one another with a condenser interposed between the discharge of each ejector and the suction of the next in such a manner that any one ejector has only to draw in the incondensable gases issuing from the preceding ejector.

Such an arrangement necessitates a very complicated pipe system, andan extent of floor space which is not always available, particularly in installations on board ship. 'In order to reduce the floor space it is desirable to arrange the ejectors ,in' line with one another and to attach to this group a condenser of elongated form with its axis parallel with that of the ejectorsf This arrangement of the apparatus in oneygroup also facilitates the regulation and control of the apparatus.

Up to the present, however, it has not been possible to employ this arrangement exactly as described, owing to the "necessity of interposing the intermediate condenser between two successive ejectors.

In principle, a steam ejector comprises the nozzles for the'livestea-m which-open into a diffuser of the converging-diverging type in which the withdrawal and compression of the fluid to be extracted from the condenser is'efiected by the live steam. Up to the present it has not appeared possible to construct ejectors other than with a diffuser having its axis rectilinear and parallel to the general direction of the current. of

steam, which necessitated placingthe inter- I mediate condenser in the prolonged axis of the same line; hence the inconvenience indicated above. 7 g

The present invention has for its object an ejector having a diffuser the axis of which forms a curved line, circular or para- 1918. Sara-m. 247,651.

bolic for example, so; as to permit theyfiuid withdrawn to pass. out of the ejector ,in an oblique directionv or even perpendicularto the direction of the steamtas it-leaves the nozzles,'that is to. say,on its entry into the diffuser, v a v This ejector-is combined with amain, condenser an: intermediate condenser and a sec-- 0nd ejector insuch a manner thatthe first ejector, which forms the suctiongfor the main condenser, isdirectly I connected to the intermediate. condenser by its curved" dif fuser without interposing special. connecting piping and the second ejector,- which fforms the suction forthe intermediate condenser.

is placed axially in line with the first ejector, the intermediate condenser preferably havlng an elongated form with its axis at a, the second in the same axial line at a. The intermediate condenser b is locaiied parallel thereto a very short distance away. The suction of the main ejector takes place at c the steam entering at al. The mixture.

is withdrawn from the first ejector by the conduit 6, traverses the auxiliary condenser b in which the steam from the first ejector is condensed, the unconde-nsed air and gases parallel and immediately adjacent to those The arrangement thus, forms a compact In this figure the first ejector is indicated are withdrawn through the conduit'f by the steam admitted at g to the second ejector.

The discharge takes place at h.

It will be observed that this arrangement greatly simplifies the pipe connections which comprise only short conduits.

Having thus described my invention, what I, claim is I j 1. In combination with a main condenser a steam ejector provided with a 'difi'user the y axis of which is a curved-line so arranged as to permit the fluid withdrawn to ,be discharged from the ejector in an oblique direction, an auxiliary condena' r of elongated form having its axis parallel and immediately adjacent tothat of the ejector. and directly connected tothe said diifuser,

a second ejector forming the suction from the auxiliary condenser and located in the same axial line as the first ejector, with the object of providing a compact unit easy to control and occupying aminimum floor space.

2. An ejector apparatus comprising a multi-stage ejector, in combination with an interstage cooler, characterized by the fact that the. separate stages of the ejector are axially aligned, the axis of the condenser is ofiset from, but parallel to, the axis of the multi-stage ejector, and the initial stageof the ejector is provided with a curved diffuser which is directly connected to the condenser and the inlet port thereof.

3. An ejector apparatus comprising a multi-stage ejector in combination with a jet condenser communicating With the dis charge of one stage and with the inlet of another stage of the ejector, characterized by that the separate stages are axially aligned are secured together as a unit, the axis of the condenser is offset from, but parallel to, the axis of the multi-stage ejector and one stage of theej-ector is provided with a'curved di-fiuser secured to the condenser and discharging directly into the inlet port thereof.

4. An ejector apparatus comprising a multi-stage ejector in combination with an intermediate condenser of elongated form, characterized by that the successive stages of the multi-stage ejector are so arranged that their rectilinear axes are in the same straight line parallel with the axis of the elongated condenser and the initial stage of the ejector isprovided with a curved diffuser discharging into the condenser and the suction of the next successive stage communicates directly with the condenser so as to form an apparatus of minimumwidth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MAURICE LEBLANC.

Witnesses:

YVONNE LANGLUME, P. I-InNDn'nsoN. 

